Patent US4256998A successfully refreshed from Google Patents.
US4256998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical control arrangement
Assignee: Individual
•
Filing: 1979-09-04
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Granted: 1981-03-17
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Expires: 1999-09-04
Abstract
Abstract An electrical control arrangement which includes firstly an electronic transducer, which is adapted to receive a controlled stream of fluid, and secondly control means to be controlled by the electronic transducer to control the speed of a micro-motor in a linear manner.
Inventors
- 👤 Basil J. Samuels
- 👤 Johann L. N. Besseling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:19
CPC Classifications
A; A61; A61C; A61C1/00; A61C1/0007; A61C1/0015; H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; H02P7/288
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
193 words
An electrical control arrangement which includes (a) a manually operable control device; (b) a solid state module; (c) an electronic transducer; (d) an electronic torque control unit; (e) a micro-motor; (f) driving means for drivingly connecting the micro-motor to a hand piece; (g) a first fluid supply conduit for supplying fluid from the control device to the solid state module; (h) a second fluid supply conduit for supplying fluid from the solid state module to the electronic transducer; (i) a first coolant supply conduit for supplying a coolant to the solid state module; (j) a second coolant supply conduit for supplying the coolant from the solid state module to the micro-motor; (k) connection means for electrically connecting respectively the electronic transducer to the electronic torque control unit, and the electronic torque control unit to the micro-motor, the electronic transducer being controllable by the manually operable control device which controls the fluid flow to the electronic transducer via the solid state module, the electronic torque control unit being controllable by the electronic transducer; and the speed of the micro-motor being variable in linear manner by the current supply from the electronic torque control unit.
Claim 2
Dependent Claim
193 words
An electrical control arrangement which includes (a) a manually operable control device; (b) a solid state module; (c) an electronic transducer; (d) an electronic torque control unit; (e) a micro-motor; (f) driving means for drivingly connecting the micro-motor to a hand piece; (g) a first fluid supply conduit for supplying fluid from the control device to the solid state module; (h) a second fluid supply conduit for supplying fluid from the solid state module to the electronic transducer; (i) a first coolant supply conduit for supplying a coolant to the solid state module; (j) a second coolant supply conduit for supplying the coolant from the solid state module to the micro-motor; (k) connection means for electrically connecting respectively the electronic transducer to the electronic torque control unit, and the electronic torque control unit to the micro-motor, the electronic transducer being controllable by the manually operable control device which controls the fluid flow to the electronic transducer via the solid state module, the electronic torque control unit being controllable by the electronic transducer; and the speed of the micro-motor being variable in linear manner by the current supply from the electronic torque control unit.
Claim 3
Dependent Claim
20 words
A control arrangement as claimed in claim 1, in which the first fluid supply conduit is adapted to supply air.
Claim 4
Dependent Claim
40 words
A control arrangement is claimed in claim 1, which additionally includes a fluid driven high speed tool, and in which a third fluid supply conduit is provided for supplying fluid from the solid state module to the high speed tool.
Claim 5
Dependent Claim
30 words
A control arrangement as claimed in claim 3, in which a third coolant supply conduit is provided for supplying coolant from the solid state module to the high speed tool.
Claim 6
Dependent Claim
17 words
A control arrangement as claimed in claim 1, in which the hand piece is a dental drill.
Claim 7
Dependent Claim
18 words
A control arrangement as claimed in claim 3, in which the high speed tool is a dental drill.
Claim 8
Dependent Claim
20 words
A control arrangement as claimed in claim 1, in which the manually operable control device includes a foot control unit.
References Cited (Backward Citations)
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US3633420A
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US3567330A
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US3604960A
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US3959883A
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US4026027A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |